package com.song.mall.member.exception;

/**
 * @author 宋超
 * HP - the login name of the current user.
 * 2021/10/4 - the current system date.
 * 9:22 - the current system time.
 */
public class UserNameExistException extends RuntimeException {
    public UserNameExistException() {
        super("用户名存在");
    }
}
